Robert Lea is a science journalist in the U.K. whose articles have been published in Physics World, New Scientist, Astronomy Magazine, All About Space, Newsweek and ZME Science. He also writes about science communication for Elsevier and the European Journal of Physics. Rob holds a bachelor of science degree in physics and astronomy from the U.K.
Quasars, the brightest objects in the cosmos, could act as cosmic signposts, directing astronomers to elusive pairs of supermassive black holes.with masses of millions or even billions of times that of the sun lurk at the heart of most, if not all, large galaxies, binary pairings of these cosmic titans have been difficult to detect. That can't be becauseare incredibly rare. After all, these behemoths form through mergers that begin when galaxies collide.
"Even after correcting for the large number of false positives in the CRTS binary candidate samples, this work shows that quasars may be more likely to host supermassive black hole binaries than random galaxies," Casey-Clyde said.Some supermassive black holes are surrounded by a vast amount of material, in the form of a flattened cloud of gas and dust called an accretion disk that gradually feeds them matter.
The results also surprised Casey-Clyde and the team, as they found that brighter quasars are less likely to host a supermassive black hole binary than fainter quasars. "In particular, detecting gravitational waves from a galaxy hosting a quasar will allow us to test how the orbital motion of a supermassive black hole binary imprints on a
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